Ventilator



Aug 9, 1-932. c. R. c. BORDE 1,871,298

VENTILATOR Filed March 1, 1950 2 Sheets-Sheet l WNW I I EHUUH WL W W lili lll. :H'I IHIH min mum 9, 1932- c. R. c. BORDEN 1,871,298

VENTILATOR 2 Sheets-Sheet 2 Filed'Maroh l, 1930 1110421050 ClaarlmflflBorden Patented Aug. 9, 1932 UNITED STATES VENTILATOR Application filed March 1, 1930. Serial No. 432,291.

"Interior ventilation and the arrest of air burdens of dust or like impurities have been problems augmented by urban developments.

Both private and public habitations withln 5 the zone of heavy traflic have been acutely afliicted with the conflicting problems of'ventilation and penetrating dirt. This is not only true on account of health and sanitation, but of practical importance on account of the 10 actual cost of daily service such as the preparation of rooms in hotels, apartments, hospitals and oflice buildings for occupancy and use. Such cleaning of dust, soot or other air carried dep'osit adds a very considerable service cost which is well recognized as a factor in operating expense.

The inrushing air in any ventilating opening tends to concentrate the dirt carried thereby and the stronger the draft past the ventilatorthe more dirt will be brought' by the incoming air.

My invention contemplates the utilization of the air velocity and its conversion from a difliculty into a factor of use. I accomplish this by providing the general. deflection surface of a ventilator with deflections localized adjacent a dirt trapping aperture into which the particles of matter pass by resultant forces While the air passes on without substantial retardation.

My invention is capable of embodiment in many forms. These vary considerably in appearance according to the material basis of their construction.

By way of illustration I show a few characteristic types. These appear in the drawings as follows:

Fig. 1 is a general face view of one form of my invention in partly detail.

Fig. 2 is a front view of a fragment of the deflector surface detailed.

Fig. 3 is a side section through such a ventilator in one of its various positions.

Fig. 4 indicates an installationshowing a central vertical disposition of the deflector surface.

Fig. 5 is a front view of a modification in fragment.

Fig. 6 a section through the same.

' Fig. 7 is a face view in partial of a further modification, and

Fig. 8 a section through the same.

. Referring to Fig. 1, the structure there shown has for a general air or draft deflecting surface a vertically or obliquely fluted face having ribs-generallyindicated at 1. In this form the ribs areangular in cross section preferably of. 20 to 45 but undercut at sucv cessive transverse planes to form shoulders The ribs are cut back transversely on faces 11 to form a succession of pyramidal figures or serrations. These form notches 12 which perspective taken in lateral pairs "form resultant apertures which communicate with the chamber 2 enclosed by a backing 3 which constitutesa shallow box or chamber in which the dirt or deposit is collected. 2

. Oonsidering'Figsj 1, 2 and 3 as a general basis of operation it will'be noted that the incoming air impinges on the deflecting surface and is generally urged upward. r Inthi's the generally upwardly divided Vertically by the ribsl/ l These divided currents pass across the faces 11 and encountering the shoulders 10 are resultantly deflected. towards the apertures at 12. The air carried dirt particles having momentum'followline's of least resistance which are along the faces 11 and inclined shoulders 10 and enter thetapertures formed by the notches 12. 4 They thusenter detachably mounted as at? 13 on the face of the ventilator. The chamber2 is substantial- PArENreF ic I deflected current is the chamber 2 which is lya dead air chamberi. The dirt passes into the box at and is collectedthere until such time as its'removal is convenient. -1

. Such ventilator traps may be variously installed and equipped. As shown inFig.' 8, a drip trough 4; is preferably arranged at the sill edge 5, just'inside-the-sash plane; 6the trough catching any rain or condensing moisas may fall from the sash above.

As shown in Fig. 4, the deflector maybe provided with lateral wings 7 so as to space it from the sides of the windowcasing and clear anyside draperies as well as to close ture and also acting as a retainer-for such dirt the entire width of the window against in by which the impinging dirt maybe deflected and trapped in a rear compartment as 2 in Fig. 3. In such forms I provide vertical strips 23 which check and baflle any cross resultants or currents. V

The general performance of draft and air currents and eddies is like that of the form :first described. 5

Referring firstto Figs. 5 and 6, the transversely disposed deflectors are shown as V,- shaped members having lowerfaces 20 and upper faces 21, The dirt receiving' apertures are intervening slotsJ22-into which the particles are'deflectedby the resultants of the air-currents andtheimomentum of the dirt particles carried thereby and directed by the surfaces 20 and 21.

In the form shown in Figs. 7 and 8 which is simplified as in Figs. 5 and 6 for production purposes, thebaflling which may be vertical or angular, is eflected by the downwardly disposed surfaces 30 and-the upwardly inclined faces 31.. These surfaces are the opposite sides of a flange bent out from a strip 1 34: to overhang the inte'rvening slot '32. These members may be made up in strip form and like those of Figs. b and 6-may be of stamped metal. 7 I V In the form shown in:F-igs. 5 and 6, the strips constituting the portions 20 and21 arepierced by thevertically disposed strips 23 which constitute the lateral deflectors. i As shown in Figs; 7 and'8, the strips-3A enter slots in the vertio al strips 33.

My invention contemplates the disposition of the general draft receiving surface in either vertical or inclined positions, the

the hollow receiver, said surface also including horizontal downwardly faced surfaces rcsistant to the upward draft of the air.

2. A ventilating device comprising a hollow dirt receiver having an air deflecting surface adapted to be disposed in upward disposition at the ventilating opening, said surface. havinga. series of pairs of narrow transverse faces converging towards an aperture opening into the hollow receiver, and said surface also including horizontal downwardly faced surfaces resistant to the upward draft of the air.

3. A ventilator comprising a hollow container adapted to be supported in a ventilatingopening and having its outer surfaces comprised of a series of transverseangular ribs and apertures therebetween, said ribs having horizontal baflle surfaces angula'rly undercut toforma seriesof pyramidal serrations whereby the upward rush of the air is deflected and the dirtparticles carried thereby thrown througlr'said apertures into the container. A

4:. A ventilation device including a dirt receiver having an air deflecting surface, said surface comprising upwardly disposed laterally convergent angular faces, each consisting of a series of projections of "pyramidal form having overhanging bases and of successive tooth formation, said surface having dirt receiving apertures disposed at the angles of the laterally receding faces.

5. A ventilating device including an air deflection surface-comprising upwardly disposed dentitions of pyramidalsection and overhanging-in vertical progression and having'dirt receiving aperturesin the apices of the re-entrant angles thereof. v

ln testimony whereof I affix my signature.

. 'cnantnsni ononnnn facets or sub-deflecting surfaces adjacent the dirt receivingiapertures being formed at proper angles with reference to the incident air current so as to give a maximum resultant deflection of the dirt particles-toward the apertures.

All such forms and varieties although differing in appearance are in accordance with V the concept of my invention which I claim as follows. g

What I therefore claim and'desire to secure by Letters Patent is: 1. A ventilating device, comprising a hollow dirt receiver having an air deflecting surface adapted to' be disposed in upward disposition at the ventilating opening, said surface having converging transversefaces andapertures therebetween and'opening into therefore 

